1366 - Incorrect integer value: '' for column `mapshopatlogis`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '3c7a12d38949f92248db2190463f56d4', '216.73.216.44', '1768915239', '1768915239', '/index.php/cat/c44_3D-Karten.html')

[XT SQL Error]